A rectangular floor 18 feet by 10 feet is to be completely covered with carpetin

游客2025-02-24 0

问题 A rectangular floor 18 feet by 10 feet is to be completely covered with carpeting that costs x dollars per square yard. In terms of x, how many dollars will the carpeting cost? (1 yard = 3 feet)

选项 A、20x
B、28x
C、60x
D、180x
E、540x

答案 A

解析一长为18英尺，宽为10英尺的长方形地板要全部铺上每平方码x美元的地毯。以x为单位，地毯总共需花多少钱?(1码=3英尺)
解：本题的正确答案为(A)。解答该题时，考生一定要注意前后单位的变化，一时疏忽很易选(D)。考虑单位变化，18/3 × 10/3 ×x=20x。

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A rectangular floor 18 feet by 10 feet is to be completely covered with carpetin

ResearchersinCityXrecentlydiscoveredlowlevelsofseveralpharmaceuticald

FirstdiscoveredseveralyearsagoinNorthAmericanlakesandrivers,thenorth

[img]ct_gre5image090[/img]Intherectangularcoordinatesystemabove,ifP,not

Intherectangularcoordinatesystem,linekpassesthroughthepoints(0,0)an

[img]ct_gre5image060[/img]Therectangularsolidaboveismadeupofeightcubes

[img]ct_gre5image052[/img]Allfacesofthesolidabovearerectangular.Column

Iftheareasofthreeofthefacesofarectangularsolidare6,10,and15,what

[img]ct_4image002[/img]Thefigureaboveshowsarectangularplayareainwhich

Arectangularfloorwithanareaof12squaremetersisdrawntoscalewith2ce

[img]ct_gre5image048[/img]Therectangularboxshownabovehasbeenwrappedwith

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PoetryNowadays,weliterarycriticsaresai

Acommonassumptionabouttheprivatesectorofeducationisthatitcater

CharacteristicsofAmericanCultureI.PunctualityA

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D解题指导：每一行的前两个图形叠加，白+白=白，黑+白=黑，黑+黑=白，得到第3个图形。故答案为D。

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